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Finding the Fourth Proportional to 315,316.50, 473,054.78 and 90,672.11

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Solution

The fourth proportional to 315,316.50, 473,054.78 and 90,672.11 is: 136,031.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,316.50 : 473,054.78 = 90,672.11 : x
  2. Step 2: Convert to fraction form
    315,316.50/473,054.78 = 90,672.11/x
  3. Step 3: Cross multiply
    315,316.50x = 473,054.78 × 90,672.11
  4. Step 4: Simplify right side
    315,316.50x = 42,892,874,683.55
  5. Step 5: Solve for x
    x = 42,892,874,683.55/315,316.50
  6. Step 6: Final answer
    x = 136,031.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.